text: * Metals exhibit a bidirectional shape-memory effect, maintaining one shape at each temperature. Polymers recover their shape only once.
  * Polymers can change their shape with elongations up to 200% while metals have a maximum of 8-10% elongation.
  * Recovery in metals and ceramics involves a change in crystal structure, while recovery in polymers is due to the action of entropic forces and anchor points.
  * Polymers can be designed according to the desired application, they can be: biodegradable, drug delivery systems (medicinal), antibacterial, etc.
  * The transition temperature is designed with "trigger" segments, which makes temperature adjustment easier than in ceramics, since they depend on equiatomic quantities.